本文实例为大家分享了ajax实现无刷新省市县三级联动的具体代码，供大家参考，具体内容如下
效果图：
实现代码：
1、html：
<html>
<head>
<title></title>
<style type="text/css">
select
{
width: 150px;
}
</style>
<script src="js/Jquery1.7.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$.ajax({
type: "post",
contentType: "application/json",
url: "WebService1.asmx/GetProvince",
data: "{}",
success: function (result) {
var stroption = '';
for (var i = 0; i < result.d.length; i ) {
stroption = '<option value=' result.d[i].provinceID '>';
stroption = result.d[i].provincename;
stroption = '</option>';
}
$('#seprovince').append(stroption);
}
})
$('#seprovince').change(function () {
$('#secity option:gt(0)').remove();
$('#searea option:gt(0)').remove();
$.ajax({
type: "post",
contentType: "application/json",
url: "WebService1.asmx/GetCItyByPro",
data: "{proid:'" $(this).val() "'}",
success: function (result) {
var strocity = '';
for (var i = 0; i < result.d.length; i ) {
strocity = '<option value=' result.d[i].cityID '>';
strocity = result.d[i].cityname;
strocity = '</option>';
}
$('#secity').append(strocity);
}
})
})
$('#secity').change(function () {
$('#searea option:gt(0)').remove();
$.ajax({
type: "post",
contentType: "application/json",
url: "WebService1.asmx/GetAreaByCity",
data: "{cityid:'" $(this).val() "'}",
success: function (result) {
var stroarea = '';
for (var i = 0; i < result.d.length; i ) {
stroarea = '<option value=' result.d[i].areaID '>';
stroarea = result.d[i].areaname;
stroarea = '</option>';
}
$('#searea').append(stroarea);
}
})
})
})
</script>
</head>
<body>
<table>
<tr>
<td>
用户名
</td>
<td>
<input id="Text1" type="text" />
</td>
</tr>
<tr>
<td>
密码
</td>
<td>
<input id="Text2" type="text" />
</td>
</tr>
<tr>
<td>
确认密码
</td>
<td>
<input id="Text3" type="text" />
</td>
</tr>
<tr>
<td>
邮箱
</td>
<td>
<input id="Text4" type="text" />
</td>
</tr>
<tr>
<td>
地址
</td>
<td>
<select id="seprovince">
<option>--请选择--</option>
</select>
省
<select id="secity">
<option>--请选择--</option>
</select>市
<select id="searea">
<option>--请选择--</option>
</select>县
</td>
</tr>
</table>
</body>
</html>
2、WebService1.asmx
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
namespace 省市县三级联动
{
/// <summary>
/// WebService1 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
[System.Web.Script.Services.ScriptService]
public class WebService1 : System.Web.Services.WebService
{
[WebMethod]
public string HelloWorld()
{
return "Hello World";
}
[WebMethod]
public List<Model.province> GetProvince()
{
BLL.province bpro = new BLL.province();
List<Model.province> list = bpro.GetListModel();
return list;
}
[WebMethod]
public List<Model.city> GetCItyByPro(string proid)
{
BLL.city bcity = new BLL.city();
List<Model.city> list = bcity.GetListModel("father='" proid "'");
return list;
}
[WebMethod]
public List<Model.area> GetAreaByCity(string cityid)
{
BLL.area barea = new BLL.area();
List<Model.area> list = barea.GetListModel("father='" cityid "'");
return list;
}
}
}
在三层的Bll层中的city.cs和area.cs中分别添加以下属性
//city.cs：
public List<Model.city> GetListModel(string strsql)
{
return dal.GetListModel(strsql);
}
//area.cs：
public List<Model.area> GetListModel(string strsql)
{
return dal.GetListModel(strsql);
}
在三层的DAL层中的city.cs和area.cs中分别添加以下方法
//city.cs：
public System.Collections.Generic.List<Model.city> GetListModel(string strsql)
{
System.Collections.Generic.List<Model.city> list = new System.Collections.Generic.List<Model.city>();
DataTable dt = GetList(strsql).Tables[0];
foreach (DataRow row in dt.Rows)
{
Model.city mcity = new Model.city();
mcity.id = Convert.ToInt32(row["id"]);
mcity.cityID = row["cityID"].ToString();
mcity.cityname = row["cityname"].ToString();
list.Add(mcity);
}
return list;
}
//area.cs：
public System.Collections.Generic.List<Model.area> GetListModel(string strsql)
{
DataTable dt = GetList(strsql).Tables[0];
System.Collections.Generic.List<Model.area> list = new System.Collections.Generic.List<Model.area>();
foreach (DataRow row in dt.Rows)
{
Model.area marea = new Model.area()
{
id = Convert.ToInt32(row["id"]),
areaID = row["areaID"].ToString(),
areaname = row["areaname"].ToString()
};
list.Add(marea);
}
return list;
}
以上就是本文的全部内容，希望对大家的学习有所帮助。